FST Sprinkler Systems 4

Question 1

Per NFPA 25, how often must a full flow trip test be conducted on a dry pipe sprinkler system?

Accepted Answer

Annually

Answer

NFPA 25 requires an annual full flow trip test of dry pipe valves to verify proper operation and measure trip time.

Question 2

What is the maximum permitted trip time for a dry pipe valve when tested under full flow conditions per NFPA 13?

Accepted Answer

60 seconds

Answer

NFPA 13 requires that water reach the inspector's test connection within 60 seconds when the dry pipe valve trips under full flow test conditions.

Question 3

A sprinkler system protecting a commercial kitchen uses sprinklers with what color coding on the frame or bulb to indicate a high temperature rating?

Accepted Answer

Orange or red

Answer

Red-coded sprinklers indicate a high temperature rating (250–300°F), and orange indicates intermediate (250°F range), both appropriate for high-heat cooking environments.

Question 4

What is the primary purpose of a hydraulic design information sign posted at a sprinkler system riser?

Accepted Answer

To display the minimum required water supply for the system

Answer

The hydraulic nameplate provides the design pressure, flow rate, and hazard classification so inspectors can verify adequate water supply during acceptance or periodic testing.

Question 5

In a wet pipe sprinkler system, what is the function of the alarm check valve?

Accepted Answer

To allow water flow to ring the water motor gong when a sprinkler activates

Answer

The alarm check valve opens under sprinkler flow conditions, directing water to the retard chamber and then to the water motor gong to sound a local alarm.

(FST) Fire Safety Technician Certification Practice Test

(FST) Fire Safety Technician Certification Practice Test

FST Sprinkler Systems 4